General discussion: electronic emission spectroscopy of CF+4 and SiF+4

1988 ◽  
Vol 324 (1578) ◽  
pp. 289-293 ◽  
Keyword(s):  
Emission Spectroscopy ◽  
Molecular Beam ◽  
Rotational Temperature ◽  
Electronic States ◽  
Emission Spectra ◽  
Fluorescence Decay ◽  
Molecular Ions ◽  
Dissociation Channel ◽  
Excited Electronic States ◽  
Beam Electron

We report the observation of electronic emission spectra in the tetrahedral molecular ions CF+4 and SiF+4. The spectra are observed at a low rotational temperature (less than 30 K) in a crossed molecular-beam - electron-beam apparatus (Carrington & Tuckett 1980). These spectra are especially interesting because the fluorescing states in the two ions lie up to 10 eV above their lowest dissociation channel (to CF+3/SiF+3 + F; see figure 1), and these states might be expected to decay non-radiatively rather than by a radiative channel. The observation of fluorescence decay from highly excited electronic states of these polyatomic ions is therefore a very surprising phenomenon.

Electronic Spectra of Single-Crystal Maleonitriledithiolate Complexes of Iridium (I): [Ir(CO)2mnt] TBA (mnt ≡ [S2C2(CN)2]2-; TBA ≡ [(C4H9)4N] + )

1989 ◽  
Vol 44 (11) ◽  
pp. 1057-1062
Author(s):  
U. Riedl ◽  
G. Gliemann
Keyword(s):  
Charge Transfer ◽  
Magnetic Fields ◽  
Optical Absorption ◽  
Single Crystal ◽  
Electronic Spectra ◽  
Electronic States ◽  
Emission Spectra ◽  
Spin Orbit ◽  
Excited Electronic States ◽  
Decay Times

The polarized optical absorption and emission (spectra, decay times) of single-crystal [lr(CO)2mnt] TBA at temperatures 2 K≦T≤295 K and homogeneous magnetic fields O≦H≦6T are reported. The highly resolved spectra show 0-0 transitions with vibrational satellites and phonon side bands. Applied magnetic fields yield no effect on the emission. The lowest excited electronic states can be assigned to the spin-orbit components A′1 B′1 and B′1 of the charge transfer triplet 3A2 (symmetry C2v)

Laser-induced fluorescence and discharge emission spectra of CrO. Rotational analysis of the A5Π–X5Π transition

1980 ◽  
Vol 58 (4) ◽  
pp. 516-533 ◽  
Author(s):  
W. H. Hocking ◽  
A. J. Merer ◽  
D. J. Milton ◽  
W. E. Jones ◽  
G. Krishnamurty
Keyword(s):  
Fluorescence Spectra ◽  
Rotational Temperature ◽  
Electronic States ◽  
Emission Spectra ◽  
Laser Induced Fluorescence ◽  
Spin Orbit Coupling ◽  
Excitation Spectra ◽  
Large Numbers ◽  
Parallel Polarization ◽  
Indirect Information

The A5Π–X5Π electronic transition of CrO, near 6000 Å, has been analysed in detail using laser-induced fluorescence and conventional discharge emission spectroscopy. The transition provides the first instance where it has been possible to analyse the rotational structures of quintet electronic states completely. Although the parallel polarization of the transition has prevented the spin–orbit coupling and Λ-doubling intervals from being observed directly, it is shown that sufficient indirect information exists in the spectrum for them to be obtained with fair precision. The excited state, A5Π, is perturbed by large numbers of other electronic states which have no intensity of their own for emission to the ground state. The analysis of the perturbed regions has been greatly facilitated by the laser-induced fluorescence spectra: the excitation spectra correspond to a rotational temperature close to room temperature (which offers a significant improvement in resolution over the discharge spectra), and the J-assignments of the perturbed lines given by the resolved fluorescence spectra are unambigious

POLARIZATION DEPENDENCE OF RESONANT SOFT X-RAY EMISSION SPECTRA IN Ce COMPOUNDS

2002 ◽  
Vol 09 (02) ◽  
pp. 983-987 ◽  
Author(s):  
M. WATANABE ◽  
Y. HARADA ◽  
M. NAKAZAWA ◽  
Y. ISHIWATA ◽  
R. EGUCHI ◽  
...  
Keyword(s):  
Energy Range ◽  
Electronic Structures ◽  
Emission Spectroscopy ◽  
Electronic States ◽  
Emission Spectra ◽  
Polarization Dependence ◽  
Raman Peak ◽  
Electron Hole ◽  
Resonant Energy ◽  
X Ray

The electronic structures of Ce compounds have been investigated by means of resonant soft X-ray emission spectroscopy (RXES) excited at resonant energy range of Ce 3d → 4f absorption. Polarization dependence of the RXES shows information on concerning electronic states. In CeO 2, the Ce 4f → 3d RXES spectra are interpreted as electronic structures hybridized between 4f0 and [Formula: see text] states. Peaks appearing in the spectra are attributed to bonding, nonbonding, and antibonding states between those states, while the spectra of CeRh 3 cannot be explained by only using the hybridization between 4f0 and [Formula: see text] states. The spectra have large broad Raman peak, especially when the excitation photon energy is set at satellite of Ce 3d → 4f absorption. We attribute the origin of the broad Raman peak to hybridization states involving electron–hole pairs.

Inversion of the 11Bu and 21Ag electronic states of all-trans-1,6-diphenyl-1,3,5-hexatriene in carbon disulfide

2017 ◽  
Vol 19 (39) ◽  
pp. 27099-27104 ◽  
Author(s):  
Javier Catalán
Keyword(s):  
Absorption Spectra ◽  
Carbon Disulfide ◽  
Electronic States ◽  
Emission Spectra ◽  
Excited Electronic States

From the analysis of UV/Vis absorption spectra, emission and excitation emission spectra of solutions of all-trans-1,6-diphenyl-1,3,5-hexatriene (DPH) in carbon disulfide, we can conclude that these spectra do not support the inversion of excited electronic states in DPH by an increased solvent polarizability as proposed by Kohler and Itoh.

Role of excited electronic states in the interactions of fast (MeV) molecular ions with solids and gases

1979 ◽  
Vol 20 (3) ◽  
pp. 834-854 ◽  
Author(s):  
E. P. Kanter ◽  
P. J. Cooney ◽  
D. S. Gemmell ◽  
K. -O. Groeneveld ◽  
W. J. Pietsch ◽  
...  
Keyword(s):  
Electronic States ◽  
Molecular Ions ◽  
Excited Electronic States
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